<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        h3 {
            font-family: Arial, Helvetica, sans-serif;
        }
    </style>
</head>
<body>
<h3>Заголовок 3</h3>
</body>
</html>